Thuja plant named ‘SMNTPGF’

ABSTRACT

A new and distinct  Thuja  cultivar named ‘SMNTPGF’ is disclosed, characterized by bright green and yellow foliage, with this bright coloration maintained in cold temperatures. Cold hardiness of the new variety is observed to USDA Zone 5. Deer resistance has been observed as well. Plants are pyramidal, dwarf and rapid growing. The new cultivar is a  Thuja , suitable for ornamental garden purposes.

Latin name of the genus and species: Thuja plicata.

Variety denomination: ‘SMNTPGF’.

BACKGROUND OF THE INVENTION

The new cultivar, hereinafter referred to as ‘SMNTPGF’, was discovered by the inventor, Timothy Wood, in a commercial nursery in Grand Haven, Mich. This new discovery is the result of an open-pollination of the seed parent Thuja plicata ‘4EVER’, U.S. Plant Pat. No. 19,267 with unidentified pollen parents during 2006.

After identifying the new variety as a potentially interesting selection during 2011, the inventor first organized propagation of ‘SMNTPGF’ by softwood cuttings at the same commercial nursery during 2011. The inventor continued controlled testing and propagation, assessing stability of the unique characteristics of this variety. At least five generations have been reproduced and have shown that the unique features of this cultivar are stable and reproduced true to type.

SUMMARY OF THE INVENTION

The cultivar ‘SMNTPGF’ has not been observed under all possible environmental conditions. The phenotype may vary somewhat with variations in environment such as temperature, day length, and light intensity, without, however, any variance in genotype. The following traits have been repeatedly observed and are determined to be the unique characteristics of ‘SMNTPGF’ These characteristics in combination distinguish ‘SMNTPGF’ as a new and distinct Thuja cultivar:

-   -   1. Fast growing dwarf plant.     -   2. Deer resistance.     -   3. Bright foliage coloration during cold conditions.     -   4. Hardy to Zone 5.

COMPARISON TO PARENT VARIETY

‘SMNTPGF’ is similar in most horticultural characteristics to the parent variety Thuja plicata ‘4EVER’. Plants of the new cultivar ‘SMNTPGF’ however, differ in the following:

-   -   1. New cultivar has lime and gold coloration; parent has lime         green coloration.     -   2. New cultivar has fuller branches; parent is not as full.

COMMERCIAL COMPARISON

Thuja ‘SMNTPGF’ can be compared to the commercial variety Thuja plicata ‘Daniellow’, U.S. Plant Pat. No. 20,267. Plants are similar in most horticultural characteristics, however, plants of the new variety differ in the following:

-   -   1. ‘SMNTPGF’ has lime and gold coloration; comparator has golden         yellow and orange coloration.     -   2. ‘SMNTPGF’ is a fuller plant; comparator is more conical.     -   3. ‘SMNTPGF’ is a dwarf plant; comparator is a medium sized         plant.

BRIEF DESCRIPTION OF THE PHOTOGRAPHS

The accompanying photograph in FIG. 1 illustrates in full color a typical plant of ‘SMNTPGF’ grown outdoors in Grand Haven, Mich. The plant is approximately 2 years old, and is shown growing in the ground.

FIG. 2 shows a close up of typical foliage of the new variety.

The photographs were taken using conventional techniques and although colors may appear different from actual colors due to light reflectance it is as accurate as possible by conventional photographic techniques.

DETAILED BOTANICAL DESCRIPTION

In the following description, color references are made to The Royal Horticultural Society Colour Chart 2015 except where general terms of ordinary dictionary significance are used, The following observations and measurements describe ‘SMNTPGF’ plants grown outdoors in Grand Haven Mich. Plants are approximately 2-3 years old, in a 3 gallon nursery container. Measurements and numerical values represent averages of typical plant types.

-   Botanical classification: Thuja plicata ‘SMNTPGF’.

PROPAGATION

-   Time to rooting: 60 to 90 days at approximately 40-50° F. -   Root description: Thick to fine, fibrous and fleshy, moderate     branching. Colored white to tan, not accurately measured with the     R.H.S. chart.

PLANT

-   Growth habit: Upright, pyramidal. -   Height: 129 cm. -   Plant spread: 60 cm. -   Typical growth rate: Rapid. Branchlets growing on average 15 to 25     cm in a season, depending upon maturity and environmental     conditions. -   Pinching required: Some pinching encourages better branching. -   Branching habit: Outwards from center stem. -   Length of lateral branches: 37 cm. -   Average number of lateral branches: 25-50. -   Diameter of lateral branches: 1 cm. -   Lateral branch color: Brown N200B. -   Lateral branch strength: Strong.     -   -   Branchlet orientation.—Vertical, upright fan spray. -   Internode length: 1.25 cm, on average. -   Trunk bark:     -   -   Color.—Near RHS Brown 200C with scales Greyed-Orange 175C.         -   Texture.—Rough, moderately scaly.

FOLIAGE

-   Leaf:     -   -   Arrangement.—Alternate, scales.         -   Shape.—Scale-like.         -   Average length.—5 mm.         -   Average width.—1 mm.         -   Apex.—Acuminate.         -   Base.—Truncate.         -   Margin.—Entire.         -   Texture of top surface.—Smooth, like plastic.         -   Texture of bottom surface.—Smooth, like plastic.         -   Color.—Young foliage upper side: Yellow 6A, fades into             mature color. Young foliage under side: Yellow Green N144B.             Mature foliage upper side: Yellow Green N144B. Mature             foliage under side: Mix of Yellow 6A and Green 143B. Mature             foliage in winter upper side: Yellow Green N144B. Mature             foliage in winder under side: Mix of Yellow 6A and Green             143B.         -   Venation.—Indistinguishable from leaf blade.         -   Fragrance.—None.

FLOWER

-   Flowering not observed.

OTHER CHARACTERISTICS

-   Disease and pest resistance: Deer resistant. No other resistance nor     susceptibility observed. -   Drought tolerance: No tolerance for drought. -   Temperature tolerance: −29° C. to 39° C. 

What is claimed is:
 1. A new and distinct cultivar of Thuja plant named ‘SMNTPGF’ as herein illustrated and described. 